Those that did had only a few, and these weren't even.
The golden rule is never buy an antique until you know for sure that its authentic.
There are several types of businesses that carry, and often specialize in, original hardware for antique furniture.
These include architectural artifact companies, antique hardware shops and some antique stores.
If the piece has drawers, remove a drawer and look closely where the front and back of the drawer connects to the sides of the drawer.
Not all pieces made before 1860 had dovetail joints on drawers.